Abstract

Specifies a procedure for the classification of timber species into positive or provisional strength groups based on testing of small, clear specimens or on the species mean dry density. When used in conjunction with visual grading rules the strength groups provide a means of determining a stress grade for graded timber. A list of species and their strength groups is given.

RECONFIRMATION NOTICE
Technical Committee TM-012 has reviewed the content of this publication and in accordance with Standards Australia procedures for reconfirmation, it has been determined that the publication is still valid and does not require change.
Certain documents referenced in the publication may have been amended since the original date of publication. Users are advised to ensure that they are using the latest versions of such documents as appropriate, unless advised otherwise in this Reconfirmation Notice.
Approved for reconfirmation in accordance with Standards Australia procedures for reconfirmation on 27 April 2017.
Approved for reconfirmation in New Zealand on behalf of the Standards Council of New Zealand on 10 August 2017.
The following are represented on Technical Committee TM-012:
Australian and New Zealand Timber Preservative Manufacturers Association
Australian Forest Products Association
Australian Pesticides and Veterinary Medicines Authority
Australian Timber Flooring Association
Australian Timber Importers Federation Inc
Building Research Association of New Zealand
Department of Agriculture, Fisheries and Forestry (QLD)
Engineered Wood Products Association of Australasia
Forest and Wood Products Australia
Forestry Corporation of NSW
Glued Laminated Timber Association of Australia
Ministry of Business, Innovation and Employment (NZ)
NATSPEC
New Zealand Timber Industry Federation
New Zealand Timber Preservation Council
New Zealand Wood Processors Association
Responsible Care New Zealand
Scion
Tasmanian Timber Promotion Board
Timber Preservers Association of Australia

Scope

This Standard establishes a procedure for the classification of timber species into strength groups based either on the values obtained from testing small clear specimens or on the species mean density at 12 percent moisture content. It specifies the unseasoned and seasoned strength groups of most of the timber species used in Australia.
NOTE: This Standard does not deal with the role that these strength groups play in the determination of stress grades, basic working stresses and characteristic properties, nor does it cover alternative means of determining stress grades of timber.
This Standard describes procedures for single species and does not cover species groups except where strength groups are given in Tables 3.1 and 3.2.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
ProductNote	Reconfirmed 29/09/2017. This standard has been reconfirmed in Australia in 2017 and remains current in New Zealand. Reconfirmation Notice 29/09/2017
Pages
ISBN
Committee	TM-003
Supersedes	AS 2878-1986 DR 97407